Rewrite the equation by completing the square.
x² + 4x = 0

(x+2)^2 = 4

Step-by-step explanation:

x² + 4x = 0

Take the coefficient of the x term

4

Divide by 2

4/2 =2

Square it

2^2 =4

Add this to each side

x^2+4x+4 = 0+4

(x+4/2)^2 = 4

(x+2)^2 = 4

what is the original number? you forgot to add it.

$9.89

step-by-step explanation:

9.90 = p x .06 x .25 (3/12 changed to a decimal)

9.90 = p x 0.015

9.90 - 0.015 = p

9.89 = p